Simulation Analysis And Optimal Design Of Vehicle Handling Stability Based On Robustness

The performance of handling and stability is an important indicator to determine the driving safety of high-speed vehicles.With the development of the society,the top speed of vehicles is higher and higher.As a result,the performance of handling and stability becomes increasingly important.In addition to the increase in handling and stability,the optimization design for the robustness of handling and stability,which is an effective method to improve the vehicle performance,are attached more and more importance in the field of automobile design.Based on the parameters of a vehicle model,the theory and method of the multi-body dynamics are applied.the virtual prototype model of the target vehicle is built by using the ADAMS software.The simulations of the suspension performance and the dynamic performance of the vehicle are carried out respectively.Simultaneously,the sensitivity of the front and rear suspension and wheel alignment parameters is analyses.By using the software for optimization,ISIGHT,the software for many-body dynamics,ADAMS,and the software for data processing,MATLAB,a co-simulation platform is built for the optimization design for the robustness of vehicle handling and stability.Research contents in details include:1.The importance of virtual prototype technology in the field of engineering is explained and the subjective and objective evaluation methods of vehicle handling and stability are elaborated.In this paper,the ADAMS/ CAR software is used to establish the vehicle dynamics model,and the correctness of the model is verified through the analysis of the front suspension simulation.2.According to GB/T6323-2014 <vehicle handling stability testing method>,slalom experiment,steering wheel angle step,steering wheel impulse and steady static circular test are conducted on the vehicle model.According to QC/T480-1999 <the performance metrics of vehicle handling and stability and the evaluation methods>,the four tests are graded,which concludes that the slalom experiment scores lower.Therefore,the next step should be based on the slalom experiment to optimize the performance of handling and stability.3.Build a joint simulation platform.In order to enable the joint simulation platform to automatically complete the simulation,data processing,data output and automatic scoring of the output data,it is first necessary to write a set of macro commands for automatically running ADAMS and a set of so that MATLAB can automatically score In the m language program,secondly,ADAMS and MATLAB components are called through ISIGHT,and finally,the operation stability optimization design is carried out through the algorithm embedded in ISIGHT.4.The two indices,which are the mean of yaw velocity in the slalom experiment and the average rotational angle of steering wheel,is optimized.Based on the Pointer algorithm,the optimal solution is solved out.Subsequently,because of the optimal solution,with the help of the Taguchi method,the exploration of the robust solution is conducted.By using Monte Carlo’s method of random sampling,the robustness of the optimal solution and the robust solution is verified,which finally concludes that the robust solution is more robust in the face of the variation of design variables.